At a murder scene, investigators find a shoe-print, several foreign hairs, and unknown fingerprints. But they believe the most telling piece of evidence is the bite mark on the victim.
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When Firefighters found an entire family dead inside their home it looked like a murder-suicide, but there were several inconsistent clues in the rubble.
A police officer accused of killing his estranged wife insists she committed suicide. Investigators say it was murder - that it was physically impossible for the woman to have shot herself.
A man tells police he shot an intruder who killed his wife. Forensic evidence disproves that story later on.
A union official is executed in his home not long after a strike by the union membership. Neither his wife nor anyone in the neighborhood heard any gunshots.
A man is found dead in his home, and his ex-wife has a perfect alibi. To determine time of death, investigators need to know when the victim ate his last meal.
Police were puzzled by an obscure print found at a crime scene where one man had been killed and two teenage girls were seriously injured.
Time of death becomes pivotal after a pregnant woman is found murdered in her air-conditioned bedroom.
A nurse experiences a variety of flu-like symptoms. None of her doctors are able to discover the cause, until she visits the gynecologist for a routine check-up.
A woman's death in Pennsylvania triggers a homicide investigation into another woman's death in North Carolina.
At a murder scene, investigators find a shoe-print, several foreign hairs, and unknown fingerprints. But they believe the most telling piece of evidence is the bite mark on the victim.
In 1993, the state of Florida was known for more than just Disney World. Worldwide attention focused on a rash of robberies which targeted tourists.
A woman is shot to death in her store just one day before she is to testify against the man accused of robbing her. The robber becomes the prime suspect, but he has a solid alibi.
A mother of two vanishes after a shopping trip. Her body is discovered a month later. Witnesses say they saw the victim being forced into a car by an unknown person.
Discovering that an assault suspect is left-handed is crucial to a police investigation dating back 16 years.
Janet Overton died suspiciously in 1988, and the investigation hit a dead end when the autopsy indicated no foul play was involved. A telephone tip and the sensitive nose of a forensic examiner indicated otherwise.
An investigation into the murder of Katie Poirier is stymied by the lack of a body. Finally, investigators use a single tooth found among some charred remains to identify her.
While investigating the murder of 9-year-old Jessica Knott, police use a garbage bag to connect a suspect.
The murders of an elderly couple leave police stumped until, two years later, they receive a major break.
When the mail-order bride of a former army sergeant goes missing, investigators look into the deaths of the man's previous two wives.
The 1996 investigation into 48-year-old Martha Hansen's murder is helped by a legal requirement that bars have video cameras installed on the premises.
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